Get the item that appears the most times in an array

Question

var store = [\'1\',\'2\',\'2\',\'3\',\'4\'];

I want to find out that 2 appear the most in the array. How do I go about doing that?

Answer 1

This solution returns an array of the most appearing numbers in an array, in case multiple numbers appear at the "max" times.

    function mode(numbers) {
      var counterObj = {}; 
      var max = 0;
      var result = [];
      for(let num in numbers) {
        counterObj[numbers[num]] = (counterObj[numbers[num]] || 0) + 1; 
        if(counterObj[numbers[num]] >= max) { 
          max = counterObj[numbers[num]];
        }
      }
      for (let num in counterObj) {
        if(counterObj[num] == max) {
          result.push(parseInt(num));
        }
      }
      return result;
    }